a) Let A = 0 -0 2 1 0 0 1 2 0 b) Determine whether b = Find null(A).. is a solution of the homogeneous system given above. 1 2 c) Let T(X)= AX. Determine whether c = -2 0 d) (i) Determine whether the columns of the matrix A, given in problem 8, are linearly independent. (ii) If not, eliminate a column so that the remaining columns are linearly independent. is in the range (T)..

Q: If Cov(X,Y) = 213, then what is Cov(8X,17Y)?

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Q: Suppose Cov(X,Y) = 65. What is Cov(0.46X, 0.39Y)?

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Q: If Cov(X,Y) = 808, then what is Cov(10X,4Y)?

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Q: Suppose that Var(X) = 934.93, Var(Y) = 11297.02, and Cov(X,Y) = 2912.35. What is Var(.87X + .13Y)?

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Q: Suppose that Var(X) = 879.05, Var(Y) = 8681.72, and Cov(X,Y) = 2281.58. What is Var(.08X + .92Y)?

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Q: Which random graph G(N, p) has (k) = 40 and variance o² of the degree distribution given by ² = 20?.

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Q: Suppose Cov(X,Y) = 821. What is Cov(6X, 4.7Y)?

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Q: If Cov(X,Y) = 100, then what is Cov(8X,10Y)?

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Q: If Cov(X,Y) = 100, then what is Cov(5X,5Y)?

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Q: Suppose that Var(X) = 742.23, Var(Y) = 8890.5, and Cov(X,Y) = 2191.72. What is Var(.51X + .49Y)?

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